Driving mechanism for phonographs.



F. KRAFT.

ECHA FOR PHONOGRAPHS.

0 FEB. 19, 1916.

ATION DRIVING M APPLIC Patented Dec, 19, 1916. 2 SHEETSQSHEET 1.

INVENTOR A TTORNE Y F. KRAFT. DRIVING MECHANISM FOR PHONOGRAPHS.

APPLICATION FILED FEB. I9, I9I6- I Patented Dec, 19,1916.

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To all whom it may concern I Be it known that l, Fnnnnnrcn KRAFT, a citizen of the United States, and a resident of Highwood Park, in the countyof Hudson and State of New Jersey, have invented certain new and useful improvements in. Drivmg Mechanisms for Phonographs, ofwhich the following is a specification.

This invention relates to a driving mech anism of novel construction for phonoand .more particularly to novel means for operating the turn table by either a mechanical or an electric motor, in such a manner that if either one of the motors is operated, the'other motor is automatically cut out. I v

In the accompanying drawing: Figure 1 is a vertical section of a phonograph having .a driving mechanism embodying my invention; Fig. 2, a horizontal section on line 22 Fig. 1, Fig. 3, a vertical section on line 3-3 Fig.2; Fig. 4, a horizontal section on line H Fig. 5; F1g. 5, a vertical section on line 55 Fig. 4; Fig. 6, a detail of the turn table driving mechanism, and Fig. 7, a wiring diaam. The cabinet passes the spindle-3 of the turn tables. From top 2 is suspendeda spring motor 5 and also an electric motor 6, from either of which the spindle 3 may be drivemthe construction being such that on actuating either one motor the other motor is automatically uncoupled, so that any'manualuncoupling of the idle motor is entirely obviated. The means for effecting this result are as follows:

The operating gear wheel 7 of the spring motor 5 engages a pinion,'8 carried by a toothed clutch jaw 9 which is loose on spindie 3. d aw 9 is adapted to correspondingly toothed jaw 10, which is held slid'ably but not rotatably on spindle 3, by a pin 11 and groove 12, the jaws 9, 10 being closed upon each other by means of a spring 13. It will be seen that when the spring motor 5 is actuated, it will by wheels 7, 8 and clutch 9, lOturn spindle 3 n the direction of the arrow (Fig. 6).

Specification of Letters Patent.

1 of the phonograph is fur-,. nished with the usual top 2, through which be engaged by a .ed against the edge of the Patented Dec. E2, 1915.

serial Iii-o. 79,2il7.

The shaft 14 of the electric motor carries a rotatable and slidable toothed clutch jaw 15 which by spring 16 is adapted to be held in engagement with a correspondingly toothed jaw 1.? fast on end of shaft 14:. Upon jaw 15 is fast a bevel gear wheel 18, engaging a corresponding wheel 19 fast on spindle 3. The latter also carries a worm Wheel 20 engaging the shaft 21 of a governor (not shown) in the usual manner.

When spring motor 5 is actuated as previously stated, wheel 19 will turn wheel 18, so as to correspondingly turn jaw 15.. But this jaw will ride idly over the teeth of jaw 17 so that the electricmotor is entirely out out.

When the electric motor is started, it will by closed clutches-1 17 and wheels 18, 19 drive spindle 3. in this case, toothed jaw 10 will ride idly over jaw 9, so that the spring motor is cut out.

Thus it will be seen that the turn table may be operated by either motor, without first uncoupling the other motor.

Means are provided for braking the turn table at the end ofthe record, the construction being such that the brake, is automatically set at the end of the inward sweep cf the tone arm. This sweep varies in length for glider-exit lengths of records, and means have therefore been devised, for causing the brake to be correctly set irrespective of the length of the tone arm sweep. In other words, the brake will be automatically applied on records of greater as well as of less length, whenever the piece of music is finished.

The means for effecting the above result are as follows: To top 2 there is secured, a plate 22 to which is pivoted at 23, a brake lever 24, having a handle 25. Lever 24 is provided with a brake shoe 26, of suitable construction which is adapted to be project turn table 4., by means of a spring 27, which is shown to be secured at one end to plate 22 andat the other end to handle 25. To lever 24 thereis pivoted one end of a rod or brmre controlling member 28 passing diametrically beneath turn table 4, and having an elongated eye 29 for the accommodation of spindle 3. The other end of rod 28, is provided with a spring arm 30, to which is secured a beveled head 31 constituting a spreading bolt; This head is adapted to engage an abutment comprising a notched sleeve 32 rotatably mounted upon pin 33, that extends upwardly from top 2, the sleeve being influenced by a spring by msulation 14, and is connected to motor 3 1. Sleeve 32 is provided with a tail piece 35 which is adapted to be engaged by a split collar or tripping member 36 encircling the tone arm 37. This collar is formed of two sections hingedly connected at one of their ends as at 38, while their spaced other ends are bent outwardly as at 39, one of such ends constituting a tripper for tail piece 35. Through ends 39 passes a pin 40, which by means of springs 11, has a tendency to contract the collar upon the tone arm.

The operation is as follows: When the machine is playing, head 31 engages notch 42 of sleeve 32, which will cause rod 28 to be so advanced, against act on of spring 27,

participated in by the collar.

that brake 26 is held off turn table 4 (Fig. 1). lVhen the tone arm has reached the end of its path, tripper 39 will strike tail 35, so as to turn sleeve 32 (against action of spring 3%) and dislodge head 31 from notch 42, the sleeve being by its spring 34 immediately returned to,its normal position, after this dislodgment has been effected. The release of the head 31 from the sleeve 32, will effect the release of rod 28, so that spring 27 will now retract the same and swing lever 24. inward to carry brake shoe 26 against turn table 4. As soon as the head 31 has relinquished sleeve 32, it will pass between the ends 39 of collar 36 (Fig. 1) and thus spread thelatter against action of springs 41, the collar being thus loosened upon the tone arm 37 but being locked in position by the interposition of the head 31. A new record is now fitted upon the turn table and the tone arm is swung inward so that the stylo is brought opposite the end of such new record, the movement of the tone arm being not The brake is released by hand lever 25, thus pulling head 31 out of collar 36, and causing the latter to be again tightened upon the tone arm by springs 41, while the head will become reengaged by sleeve 32. The motor is started and the tone arm is swung to the beginning of the record carrying the collar 36 with it, whereupon the piece is played and the operation described is repeated.

' It will be seen that the collar 36 will trip the brake controlling means, as soon as the tone arm has reached the end of its path and that the collar will be set automatically in such a manner that it will bc carried in due time against the brakr wntiollinj moans. irrespective of the length of the 1 mt. arm

stroke. In this way, the brake will be promptly applied at the end of longer as well as of shorter records.

In case the turn table is operated by an electric motor, the brake may be so connected to the motor that the latter is automatically started as soon as the brake is taken off. For this purpose there is provided, a contact 43, which is separated from plate 22 6 by wire 45 (Fig. 7), while a second wire 46 leads from lever 24: through the source of power to the motor. When the brake is 0%, the circuit will thus be closed, and the motor started. 3

The amplifying horn 17 is mounted within the cabinet 1, in the peculiar manner shown in Fig. 1. That is to say, it extends first downward along the back of the cabinet, and then forward along the bottom of the cabinet, so as to open with its belled mouth at the lower portion of the cabinet front. In this way, the entire upper front portion of the cabinet, 2'. e. that portion which is located within the bend of the horn, remains vacant, and may thus be utilized for the formation of a number of record receiving compartments. As shown, the space is divided by walls 48 and 419 into an upper compartment 50 and a lower compartment 51, adapted to receive two separate rows of records 52, so that in this way, the capacity of the cabinet is thoroughly utilized. It is obvious, however, that the peculiar arrange ment of the compartment shown may be readily varied, without departing from the spirit of my invention.

I claim:

1. A driving mechanism for phonograph: comprising a turn table, a spindle depending therefrom, a spring motor and an electric V motor, both coupled to the spindle, and means controlled by the spindle for cutting out the electric motor when actuated by the spring motor.

2. A driving mechanism for phonographs comprising a turn table, a spindle depending therefrom, a spring motor and an electric motor, both coupled to the spindle, and means controlled by the spindle for cutting out the spring motor when actuated by the electric motor.

A. driving mechanism for phonographscomprising a turn table, a spindle depending therefrom, a. spring motor and an electric motor, both coupled to the spindle, and means controlled by the spindle for cutting out either one motor when actuated by the other motor.

4. A driving mechanism for phonographs comprising a turn table, a spindle depending therefrom, a spring motor, clutch-controlled coupling means between said motor and spindle, an electric motor, and clutch controlled coupling means between said last named motor and spindle, one of said clutchcontrolled coupling means being in operative engagement While the other is in slidable engagement.

5. A driving mechanism for phonographs comprising a turn table, a spindle depending therefrom, a spiin'g motor, a clutch having a first member intergeared with the spring motor and a second spring-controlled 10 member slidable on the spindle, an electric motor, a shaft on said motor, and a clutch having a first spring-controlled member that is slidable on the shaft and is intergeared with the spindle, and a second member fast 15 on the shaft.

FREDERICK KRAFT. 

